31998320

素因数分解:

$2^4\times 5^1\times {\mathrm{399979}}^1$

素因数の和:399992

約数の個数: 20

約数和(自身を含む): 74396280

約数和(自身を除く): 42397960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 399979, 799958, 1599916, 1999895, 3199832, 3999790, 6399664, 7999580, 15999160, 31998320]

約数ペア:

[(1, 31998320), (2, 15999160), (4, 7999580), (5, 6399664), (8, 3999790), (10, 3199832), (16, 1999895), (20, 1599916), (40, 799958), (80, 399979)]